Numerical Simulation Of Wind Load And Wind-Induced Vibration Control Of Stadium Canopy Structures

The canopy structure is a conventional type of structure in long-span structures. This structure has light weight, large flexibility, small damp and low natural vibration frequency, and it is very sensitive to wind load. So wind load is very important for the canopy structure. It's necessary to analyze wind-induced response of such structures reasonably and to control the vibration effectively.Based on Auto-Regressive Method, the way of numerical simulation of wind-load considering spatial relativity is determined, and the simulation program is developed in the paper as well. According to the measure mentioned above, wind velocity time-history for the joints in one canopy structure is simulated, and the results show that the simulated one is nearly identical with the aim spectrum. To satisfy the analysis of wind-induced response, the velocity time-history is necessary to be transformed into load time-history firstly, and the response for wind resisting design may be calculated then. It can be seen that the measure of numerical simulation of wind-load introduced in the paper is also flexible to analyze the wind-induced response of the canopy structure.Because the structures have large wind-induced vibration, the viscous dampers are used to control the wind-induced vibration. The result shows that the joint displacement and acceleration and the element axial force have apparente control effect especially vertical acceleration using the viscous dampers. It can be seen that the effect of the viscous dampers is remarkable in controlling the wind-induced vibration of the canopy structures. Parametric studies for control performance of the viscous damper in the canopy structures are carried out. By analysis, practical engineering suggestions are presented.